EP2995553B1 - Air generation unit for an aircraft and method for its operation - Google Patents
Air generation unit for an aircraft and method for its operation Download PDFInfo
- Publication number
- EP2995553B1 EP2995553B1 EP14184073.6A EP14184073A EP2995553B1 EP 2995553 B1 EP2995553 B1 EP 2995553B1 EP 14184073 A EP14184073 A EP 14184073A EP 2995553 B1 EP2995553 B1 EP 2995553B1
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- EP
- European Patent Office
- Prior art keywords
- air
- aircraft
- flow control
- control system
- generation unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims description 7
- 238000004378 air conditioning Methods 0.000 claims description 33
- 230000001419 dependent effect Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft
- B64D13/06—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft the air being conditioned
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C21/00—Influencing air flow over aircraft surfaces by affecting boundary layer flow
- B64C21/02—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like
- B64C21/04—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like for blowing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C21/00—Influencing air flow over aircraft surfaces by affecting boundary layer flow
- B64C21/02—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like
- B64C21/06—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like for sucking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C21/00—Influencing air flow over aircraft surfaces by affecting boundary layer flow
- B64C21/02—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like
- B64C21/08—Influencing air flow over aircraft surfaces by affecting boundary layer flow by use of slot, ducts, porous areas or the like adjustable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C2230/00—Boundary layer controls
- B64C2230/20—Boundary layer controls by passively inducing fluid flow, e.g. by means of a pressure difference between both ends of a slot or duct
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft
- B64D13/06—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft the air being conditioned
- B64D2013/0603—Environmental Control Systems
- B64D2013/0618—Environmental Control Systems with arrangements for reducing or managing bleed air, using another air source, e.g. ram air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft
- B64D13/06—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft the air being conditioned
- B64D2013/0603—Environmental Control Systems
- B64D2013/0622—Environmental Control Systems used in combination with boundary layer control systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/10—Drag reduction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/50—On board measures aiming to increase energy efficiency
Definitions
- the invention relates to an air generation unit for an aircraft, an air generation arrangement, an aircraft and a method for operating an air generation unit in an aircraft.
- US 2009/014593 A1 discloses a cooling system on board an aircraft including a device for removing by suction a boundary layer, and a heat exchanger through which flows the boundary layer air that has been removed by suction.
- US 2003/150962 A1 discloses a method to delay flow separation from a solid body in a fluid stream by coupling a region of a suction peak with a region of adverse pressure gradient.
- pressurized air which must be provided by some sort of air source.
- pressurized air is supplied by compressor units or extracted as bleed-air from turbofan engines.
- this supply of air can be improved.
- compressors units have significant implications on aircraft weight, while a coupling to turbofan engines is unfavorable from a performance point of perspective.
- an air generation unit for an aircraft comprises an air supply means and a control unit.
- the air supply means is configured to supply air to an air conditioning system of an aircraft's cabin.
- the air supply means is further or alternatively configured to supply air to a flow control system of an aircraft.
- the control unit is configured to provide, during cruise conditions of the aircraft, a larger amount of the air to the air conditioning system than to the flow control system.
- the control unit is further configured to provide, during take-off and/or landing conditions of the aircraft, a larger amount of the air to the flow control system than to the air conditioning system.
- the present invention provides an integrated unit for cabin-air conditions/pressurization and flow control air supply.
- the air generation unit is used for cabin pressurization and air conditioning, as well as for flow control air supply.
- This double-use of infrastructure provides a weight benefit for the aircraft. Further, a decoupling from the compressor units and the turbofan engines is possible.
- pressurization and air-conditioning is needed at a much lower extent than during cruise, sometimes even switched off, so that the air generation unit can be used for supplying pressurized air to the flow control.
- flow control is needed at a much lower extent than during take-off and landing, sometimes switched off, so that the air generation unit can be used for supplying pressurized air to the air conditioning system.
- the air generation unit can be dimensioned according to cruise requirements.
- the flow control system may be utilized, e.g., in order to prevent flows from separating or detaching from an airfoil portion or from another flow body, or to reattach a flow that has already detached or separated from the airfoil portion or other flow body.
- the flow control system may be also configured to provide boundary layer suction to inhale the detaching or detached boundary layer or to prevent laminar turbulent transition for better drag during cruise. Thereby, the flow control can lead to an increased lift by eliminating separations, while holding the angle of attack constant, or by delaying the stall of a particular surface to higher degrees of flow incidence, consequently increasing the lift as well.
- the airfoil may be a flap, a wing, a winglet, a vertical or horizontal tail plane, a slat, a tap, a control surface, a mounting surface, a landing gear and/or a fuselage portion.
- the flow control system of the airfoil portion can be any part where separation of air flows occurs or where it is desired to suppress laminar turbulent transition and to reduce friction drag.
- control unit is configured to provide during cruise conditions between 80 and 100 % of the air to the air conditioning system, preferably between 90 and 100 %, and more preferably between 95 and 100 %.
- the air generation unit may be dimensioned for cruise requirements of the air conditioning system.
- control unit is configured to provide during cruise conditions between 0 and 20 % of the air to the flow control system, preferably between 0 and 10 %, more preferably between 0 and 5 %.
- control unit is configured to provide during take-off and/or landing conditions between 50 and 100 % of the air to the flow control system, preferably between 60 and 80 %, more preferably between 65 and 75 %.
- control unit is configured to provide during take-off and/or landing conditions between 0 and 50 % of the air to the air conditioning system, preferably between 20 and 40 %, more preferably between 25 and 35 %.
- the air supply means are provided with air by an air intake at the airfoil.
- the air intake is used as suction device to inhale at least parts of the air that is used for cabin pressurization and acclimatization.
- the air supplied to the air conditioning system and/or to the flow control system is pressurized air.
- the pressurized air may be pressurized in a range between 0 and 5 bar, preferably between 0 and 4 bar.
- the air generation arrangement for an aircraft comprises an air generation unit as described above and a flow control system for the aircraft.
- the flow control system is an active flow control system and comprises a fluidic actuator configured to provide a steady or unsteady air flow relative to a surface of the airfoil.
- the air flow relative to the surface of the airfoil portion may be along the surface, orthogonal, tangential or combinations thereof.
- the air flow may energize a detaching or detached boundary layer at the surface of the airfoil to modify the air circulation of the airfoil to e.g. introduce control moments or to reduce buffeting.
- the at least one fluidic actuator maybe realized to provide a pulsed ejection from an opening in the airfoil.
- the fluidic actuator may utilize valves or other active flow influencing means for the provision of the pulsed flow.
- the air ejection is able to delay separations to higher flow incident angles by introducing vortical structures, which convect downstream of the airfoil thus energizing the otherwise separated flow area.
- the active flow control system may comprise several openings and at least one fluidic actuator with an inlet connectable to an air source.
- the openings may be distributed along or parallel to e.g. a leading edge in a side-by-side relationship.
- the fluidic actuator may be designed such that air from the inlet flows to outlets connected to the openings.
- the aircraft comprises a cabin with an air conditioning system, an airfoil with a flow control system, and an air generation unit with an air supply means and a control unit as described above.
- the air supply means is configured to supply air to the air conditioning system and to a flow control system.
- the control unit is configured to provide, during cruise conditions of the aircraft, a larger amount of the air to the air conditioning system than to the flow control system, and during take-off and/or landing conditions of the aircraft, a larger amount of the air to the flow control system than to the air conditioning system.
- the airfoil may be a flap, an inboard flap, a wing, a winglet, a vertical or horizontal tail plane, a slat, a tap, a control surface, a mounting surface, and/or a fuselage portion.
- the air generation unit is at least partially arranged close to the flow control system.
- the air generation unit may also be at least partially arranged at the airfoil and/or in a fuselage area next to the airfoil.
- the air supply means are provided with air by an air intake at the airfoil.
- the air intake is used as suction device to inhale at least parts of the air that is used for cabin pressurization and acclimatization.
- a method for operating an air generation unit in an aircraft comprises a controlling of air supply to provide, during cruise conditions of the aircraft, a larger amount of the air to an air conditioning system of the aircraft than to a flow control system of the aircraft, and during take-off and/or landing conditions of the aircraft, a larger amount of the air to the flow control system than to the air conditioning system.
- Fig. 1 shows schematically and exemplarily an aircraft 100 with an air generation arrangement 10 according to the invention.
- the air generation arrangement 10 comprises an air generation unit 1 and a flow control system 5.
- the air generation unit 1 comprises an air supply means 2 and a control unit 3 arranged in a fuselage area next to the aircraft's wings.
- the air supply means 2 supplies air to an air conditioning system 4 of the aircraft's cabin and to the aircraft's flow control system 5.
- the control unit 3 provides, during cruise conditions of the aircraft 100, a larger amount of the air to the air conditioning system 4 than to the flow control system 5.
- the control unit 3 further provides, during take-off and/or landing conditions of the aircraft 100, a larger amount of the air to the flow control system 5 than to the air conditioning system 4.
- control unit 3 provides during cruise conditions between 80 and 100 % of the air to the air conditioning system 4 and between 0 and 20 % of the air to the flow control system 5. During take-off and/or landing conditions, the control unit 3 provides between 50 and 100 % of the air to the flow control system 5 and between 0 and 50 % of the air to the air conditioning system 4.
- the flow control system 5 is here an active flow control system arranged close to the air generation unit 1.
- the flow control system 5 comprises fluidic actuators 51 arranged at the aircraft's airfoil 6 to provide an air flow along a surface of the airfoil 6.
- the airfoil 6 is here a flap.
- the air flow may energize a detaching or detached boundary layer at the surface of the airfoil 6 to modify the air circulation of the airfoil 6 to e.g. introduce control moments or to reduce buffeting.
- the fluidic actuators 51 provide pulsed ejections from openings (not shown) in the airfoil 6. The openings are distributed along a leading edge of the flap in a side-by-side relationship. For e.g. an A320 type of aircraft, an air flow of 2kg/s and 0.5 bar gauge pressure at the inboard flaps can be used.
- the air supply means 2 are here provided with air by air intakes 7 arranged e.g. at outer portions of the aircraft's wings.
- the air intake 7 is used as suction device to inhale at least parts of the air that is used for cabin pressurization and acclimatization.
- the air supplied to the air conditioning system 4 and to the flow control system 5 is pressurized air, here in a range between 0 and 5 bar.
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air-Conditioning For Vehicles (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Description
- The invention relates to an air generation unit for an aircraft, an air generation arrangement, an aircraft and a method for operating an air generation unit in an aircraft.
-
US 2009/014593 A1 discloses a cooling system on board an aircraft including a device for removing by suction a boundary layer, and a heat exchanger through which flows the boundary layer air that has been removed by suction. -
US 2003/150962 A1 discloses a method to delay flow separation from a solid body in a fluid stream by coupling a region of a suction peak with a region of adverse pressure gradient. - Multiple devices of an aircraft, as e.g. an air conditioning system or a flow control system need pressurized air which must be provided by some sort of air source. Conventionally, pressurized air is supplied by compressor units or extracted as bleed-air from turbofan engines. However, this supply of air can be improved. For example, compressors units have significant implications on aircraft weight, while a coupling to turbofan engines is unfavorable from a performance point of perspective.
- Hence, there may be a need to provide an improved air generation unit for an aircraft, which allows reducing the aircraft's weight.
- The problem of the present invention is solved by the subject-matters of the independent claims, wherein further embodiments are incorporated in the dependent claims. It should be noted that the aspects of the invention described in the following apply also to the air generation unit for an aircraft, the air generation arrangement, the aircraft and the method for operating the air generation unit in the aircraft.
- According to the present invention, an air generation unit for an aircraft is presented. The air generation unit for an aircraft comprises an air supply means and a control unit. The air supply means is configured to supply air to an air conditioning system of an aircraft's cabin. The air supply means is further or alternatively configured to supply air to a flow control system of an aircraft. The control unit is configured to provide, during cruise conditions of the aircraft, a larger amount of the air to the air conditioning system than to the flow control system. The control unit is further configured to provide, during take-off and/or landing conditions of the aircraft, a larger amount of the air to the flow control system than to the air conditioning system.
- Thereby, the present invention provides an integrated unit for cabin-air conditions/pressurization and flow control air supply. In other words, the air generation unit is used for cabin pressurization and air conditioning, as well as for flow control air supply. This double-use of infrastructure provides a weight benefit for the aircraft. Further, a decoupling from the compressor units and the turbofan engines is possible.
- During take-off and landing, pressurization and air-conditioning is needed at a much lower extent than during cruise, sometimes even switched off, so that the air generation unit can be used for supplying pressurized air to the flow control. During cruise, however, flow control is needed at a much lower extent than during take-off and landing, sometimes switched off, so that the air generation unit can be used for supplying pressurized air to the air conditioning system. As a result, the air generation unit can be dimensioned according to cruise requirements.
- The flow control system may be utilized, e.g., in order to prevent flows from separating or detaching from an airfoil portion or from another flow body, or to reattach a flow that has already detached or separated from the airfoil portion or other flow body. The flow control system may be also configured to provide boundary layer suction to inhale the detaching or detached boundary layer or to prevent laminar turbulent transition for better drag during cruise. Thereby, the flow control can lead to an increased lift by eliminating separations, while holding the angle of attack constant, or by delaying the stall of a particular surface to higher degrees of flow incidence, consequently increasing the lift as well.
- The airfoil may be a flap, a wing, a winglet, a vertical or horizontal tail plane, a slat, a tap, a control surface, a mounting surface, a landing gear and/or a fuselage portion. In other words, the flow control system of the airfoil portion can be any part where separation of air flows occurs or where it is desired to suppress laminar turbulent transition and to reduce friction drag.
- In an example, the control unit is configured to provide during cruise conditions between 80 and 100 % of the air to the air conditioning system, preferably between 90 and 100 %, and more preferably between 95 and 100 %. In other words, the air generation unit may be dimensioned for cruise requirements of the air conditioning system.
- In an example, the control unit is configured to provide during cruise conditions between 0 and 20 % of the air to the flow control system, preferably between 0 and 10 %, more preferably between 0 and 5 %.
- In an example, the control unit is configured to provide during take-off and/or landing conditions between 50 and 100 % of the air to the flow control system, preferably between 60 and 80 %, more preferably between 65 and 75 %.
- In an example, the control unit is configured to provide during take-off and/or landing conditions between 0 and 50 % of the air to the air conditioning system, preferably between 20 and 40 %, more preferably between 25 and 35 %.
- In an example, the air supply means are provided with air by an air intake at the airfoil. In other words, the air intake is used as suction device to inhale at least parts of the air that is used for cabin pressurization and acclimatization.
- In an example, the air supplied to the air conditioning system and/or to the flow control system is pressurized air. The pressurized air may be pressurized in a range between 0 and 5 bar, preferably between 0 and 4 bar.
- According to the present invention, also an air generation arrangement for an aircraft is presented. The air generation arrangement for an aircraft comprises an air generation unit as described above and a flow control system for the aircraft.
- In an example, the flow control system is an active flow control system and comprises a fluidic actuator configured to provide a steady or unsteady air flow relative to a surface of the airfoil. The air flow relative to the surface of the airfoil portion may be along the surface, orthogonal, tangential or combinations thereof. The air flow may energize a detaching or detached boundary layer at the surface of the airfoil to modify the air circulation of the airfoil to e.g. introduce control moments or to reduce buffeting.
- The at least one fluidic actuator maybe realized to provide a pulsed ejection from an opening in the airfoil. The fluidic actuator may utilize valves or other active flow influencing means for the provision of the pulsed flow. The air ejection is able to delay separations to higher flow incident angles by introducing vortical structures, which convect downstream of the airfoil thus energizing the otherwise separated flow area.
- In summary, the active flow control system may comprise several openings and at least one fluidic actuator with an inlet connectable to an air source. The openings may be distributed along or parallel to e.g. a leading edge in a side-by-side relationship. The fluidic actuator may be designed such that air from the inlet flows to outlets connected to the openings.
- According to the present invention, also an aircraft is presented. The aircraft comprises a cabin with an air conditioning system, an airfoil with a flow control system, and an air generation unit with an air supply means and a control unit as described above. The air supply means is configured to supply air to the air conditioning system and to a flow control system. The control unit is configured to provide, during cruise conditions of the aircraft, a larger amount of the air to the air conditioning system than to the flow control system, and during take-off and/or landing conditions of the aircraft, a larger amount of the air to the flow control system than to the air conditioning system.
- In an example, at least parts of the flow control system are arranged at the airfoil. The airfoil may be a flap, an inboard flap, a wing, a winglet, a vertical or horizontal tail plane, a slat, a tap, a control surface, a mounting surface, and/or a fuselage portion.
- In an example, the air generation unit is at least partially arranged close to the flow control system. The air generation unit may also be at least partially arranged at the airfoil and/or in a fuselage area next to the airfoil.
- In an example, the air supply means are provided with air by an air intake at the airfoil. In other words, the air intake is used as suction device to inhale at least parts of the air that is used for cabin pressurization and acclimatization.
- According to the present invention, also a method for operating an air generation unit in an aircraft is presented. It comprises a controlling of air supply to provide, during cruise conditions of the aircraft, a larger amount of the air to an air conditioning system of the aircraft than to a flow control system of the aircraft, and during take-off and/or landing conditions of the aircraft, a larger amount of the air to the flow control system than to the air conditioning system.
- It shall be understood the air generation unit for an aircraft, the air generation arrangement, the aircraft and the method for operating an air generation unit in an aircraft according to the independent claims have similar and/or identical preferred embodiments, in particular, as defined in the dependent claims. It shall be understood further that a preferred embodiment of the invention can also be any combination of the dependent claims with the respective independent claim.
- These and other aspects of the present invention will become apparent from and be elucidated with reference to the embodiments described hereinafter.
- Exemplary embodiments of the invention will be described in the following with reference to the accompanying drawing:
- Fig. 1
- shows schematically and exemplarily an aircraft with an air generation arrangement comprising an air generation unit and a flow control system according to the invention.
-
Fig. 1 shows schematically and exemplarily anaircraft 100 with anair generation arrangement 10 according to the invention. Theair generation arrangement 10 comprises an air generation unit 1 and aflow control system 5. - The air generation unit 1 comprises an air supply means 2 and a
control unit 3 arranged in a fuselage area next to the aircraft's wings. The air supply means 2 supplies air to an air conditioning system 4 of the aircraft's cabin and to the aircraft'sflow control system 5. Thecontrol unit 3 provides, during cruise conditions of theaircraft 100, a larger amount of the air to the air conditioning system 4 than to theflow control system 5. Thecontrol unit 3 further provides, during take-off and/or landing conditions of theaircraft 100, a larger amount of the air to theflow control system 5 than to the air conditioning system 4. - In this embodiment, the
control unit 3 provides during cruise conditions between 80 and 100 % of the air to the air conditioning system 4 and between 0 and 20 % of the air to theflow control system 5. During take-off and/or landing conditions, thecontrol unit 3 provides between 50 and 100 % of the air to theflow control system 5 and between 0 and 50 % of the air to the air conditioning system 4. - The
flow control system 5 is here an active flow control system arranged close to the air generation unit 1. Theflow control system 5 comprisesfluidic actuators 51 arranged at the aircraft'sairfoil 6 to provide an air flow along a surface of theairfoil 6. Theairfoil 6 is here a flap. The air flow may energize a detaching or detached boundary layer at the surface of theairfoil 6 to modify the air circulation of theairfoil 6 to e.g. introduce control moments or to reduce buffeting. Thefluidic actuators 51 provide pulsed ejections from openings (not shown) in theairfoil 6. The openings are distributed along a leading edge of the flap in a side-by-side relationship. For e.g. an A320 type of aircraft, an air flow of 2kg/s and 0.5 bar gauge pressure at the inboard flaps can be used. - The air supply means 2 are here provided with air by
air intakes 7 arranged e.g. at outer portions of the aircraft's wings. In other words, theair intake 7 is used as suction device to inhale at least parts of the air that is used for cabin pressurization and acclimatization. The air supplied to the air conditioning system 4 and to theflow control system 5 is pressurized air, here in a range between 0 and 5 bar. - While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive. The invention is not limited to the disclosed embodiments. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing a claimed invention, from a study of the drawings, the disclosure, and the dependent claims.
- In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. A single processor or other unit may fulfil the functions of several items re-cited in the claims. The mere fact that certain measures are re-cited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs in the claims should not be construed as limiting the scope.
Claims (15)
- An air generation unit (1) for an aircraft (100), comprising- an air supply means (2); and- a control unit (3);wherein the air supply means (2) is configured to supply air to an air conditioning system (4) of an aircraft's cabin and to a flow control system (5) of the aircraft (100); and
wherein the control unit (3) is configured to provide,
during cruise conditions of the aircraft (100), a larger amount of the air supplied by the air supply means (2) to the air conditioning system (4) than to the flow control system (5), and
during take-off and/or landing conditions of the aircraft (100), a larger amount of the air supplied by the air supply means (2) to the flow control system (5) than to the air conditioning system (4). - Air generation unit (1) according to claim 1, wherein the control unit (3) is configured to provide during cruise conditions between 80 and 100 % of the air to the air conditioning system (4), preferably between 90 and 100 %, more preferably between 95 and 100 %.
- Air generation unit (1) according to claim 1 or 2, wherein the control unit (3) is configured to provide during take-off and/or landing conditions between 50 and 100 % of the air to the flow control system (5), preferably between 60 and 80 %, more preferably between 65 and 75 %.
- Air generation unit (1) according to one of the preceding claims, wherein the control unit (3) is configured to provide during take-off and/or landing conditions between 0 and 50 % of the air to the air conditioning system (4), preferably between 20 and 40 %, more preferably between 25 and 35 %.
- Air generation unit (1) according to one of the preceding claims, wherein the air supplied to the air conditioning system (4) and/or to the flow control system (5) is pressurized air.
- Air generation unit (1) according to the preceding claim, wherein the pressurized air supplied to the air conditioning system (4) is pressurized in a range between 0 and 5 bar, preferably between 0 and 4 bar.
- Air generation unit (1) according to the preceding claim, wherein the pressurized air supplied to the flow control system (5) is pressurized in a range between 0 and 5 bar, preferably between 0 and 4 bar.
- An air generation arrangement (10) for an aircraft (100), comprising an air generation unit (1) according to one of the preceding claims and a flow control system (5) for the aircraft (100).
- Air generation arrangement (10) according to the preceding claim, wherein the flow control system (5) comprises a fluidic actuator configured to provide an air flow relative to a surface of the airfoil (6).
- An aircraft (100) comprising- a cabin with an air conditioning system (4),- an airfoil (6) with a flow control system (5), and- an air generation unit (1) according to one of the claims 1 to 7.
- Aircraft (100) according to the preceding claim, wherein the airfoil (6) is a flap, a wing, a winglet, a vertical or horizontal tail plane, a slat, a tap, a control surface, a mounting surface, a landing gear and/or a fuselage portion.
- Aircraft (100) according to one of the preceding claims, wherein at least parts of the flow control system (5) are arranged at the airfoil (6).
- Aircraft (100) according to one of the preceding claims, wherein the air generation unit (1) is at least partially arranged close to the flow control system (5), preferably at the airfoil (6) and/or in a fuselage area next to the airfoil (6).
- Aircraft (100) according to one of the preceding claims, wherein the air supply means (2) are provided with air by an air intake (7) at the airfoil (6).
- A method for operating an air generation unit (1) in an aircraft (100), comprising a supplying of air and a controlling of air to provide, during cruise conditions of the aircraft (100), a larger amount of the supplied air to an air conditioning system (4) of the aircraft (100) than to a flow control system (5) of the aircraft (100), and
during take-off and/or landing conditions of the aircraft (100), a larger amount of the supplied air to the flow control system (5) than to the air conditioning system (4).
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14184073.6A EP2995553B1 (en) | 2014-09-09 | 2014-09-09 | Air generation unit for an aircraft and method for its operation |
JP2015172571A JP6133946B2 (en) | 2014-09-09 | 2015-09-02 | Air generation unit for aircraft |
CN201510564773.7A CN105398567B (en) | 2014-09-09 | 2015-09-07 | Air generation unit for aircraft |
KR1020150126948A KR101710691B1 (en) | 2014-09-09 | 2015-09-08 | Air generator for an aircraft |
US14/847,129 US20160068270A1 (en) | 2014-09-09 | 2015-09-08 | Air generation unit for an aircraft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14184073.6A EP2995553B1 (en) | 2014-09-09 | 2014-09-09 | Air generation unit for an aircraft and method for its operation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2995553A1 EP2995553A1 (en) | 2016-03-16 |
EP2995553B1 true EP2995553B1 (en) | 2017-02-01 |
Family
ID=51494158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14184073.6A Active EP2995553B1 (en) | 2014-09-09 | 2014-09-09 | Air generation unit for an aircraft and method for its operation |
Country Status (5)
Country | Link |
---|---|
US (1) | US20160068270A1 (en) |
EP (1) | EP2995553B1 (en) |
JP (1) | JP6133946B2 (en) |
KR (1) | KR101710691B1 (en) |
CN (1) | CN105398567B (en) |
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US10399670B2 (en) | 2016-09-26 | 2019-09-03 | General Electric Company | Aircraft having an aft engine and internal flow passages |
US10611458B2 (en) * | 2017-05-09 | 2020-04-07 | The Boeing Company | Aircraft cabin noise reduction systems and methods |
US20220315208A1 (en) * | 2019-09-03 | 2022-10-06 | Bae Systems Plc | Vehicle control |
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- 2015-09-07 CN CN201510564773.7A patent/CN105398567B/en not_active Expired - Fee Related
- 2015-09-08 KR KR1020150126948A patent/KR101710691B1/en active IP Right Grant
- 2015-09-08 US US14/847,129 patent/US20160068270A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
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CN105398567A (en) | 2016-03-16 |
KR20160030375A (en) | 2016-03-17 |
CN105398567B (en) | 2017-09-12 |
KR101710691B1 (en) | 2017-02-27 |
EP2995553A1 (en) | 2016-03-16 |
JP2016055863A (en) | 2016-04-21 |
US20160068270A1 (en) | 2016-03-10 |
JP6133946B2 (en) | 2017-05-24 |
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